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Experimental demonstration of digital predistortion for orthogonal frequency-division multiplexing-radio over fibre links near laser resonance
2015
IET Optoelectronics
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Both memoryless and memory polynomial predistorter models, and a simple off-line least-squares-based identification method, are used, with excellent performance improvements demonstrated up to 3.0 GHz. ...
In addition, the resilience of the predistortion approach to changes in modulation level of QAM schemes, and average power levels are investigated, and a novel predistortion training approach is proposed ...
Acknowledgments The authors would like to thank Anthony Nkansah for developing the Simulink model used for generating the user-defined OFDM signals. ...
doi:10.1049/iet-opt.2014.0160
fatcat:6l6q5xfynrf55haw7tccfo6r4q
OFDM Signaling for SWIPT Systems under High Power Amplifier Nonlinearities and Memory Effects
2021
Zenodo
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Specifically, we investigate the impact of high peak-to-average power ratio (PAPR) on OFDM-based information/energy transfer under the nonlinearities and memory effects introduced by high power amplifier ...
In this paper, we study the employment of conventional orthogonal frequency division multiplexing (OFDM) signals in simultaneous wireless information and power transfer (SWIPT) systems. ...
In order to characterize the memory effects of the nonlinear HPA, we use the memory polynomial model (MPM) [14] , x out (n) = P p=1 M m=0 c p,m x in (n − m)|x in (n − m)| p−1 , (2) where P refers to the ...
doi:10.5281/zenodo.5513657
fatcat:bax6sr2lqjfplgykizyihcisay
Digital Compensation of Amplifier Nonlinearities in the Receiver of a Wireless System
2007
2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux
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power amplifiers. ...
In order to enable efficient implementation of wireless systems with high signal dynamics, this paper proposes an approach to estimate and correct for the amplitude and phase distortion caused by nonlinear ...
The work of Tim Schenk was sponsored in part by the B4 BroadBand Radio@Hand project (BTS01063) and in part by a travel grant of the Netherlands Organization for Scientific Research (NWO). ...
doi:10.1109/scvt.2007.4436243
fatcat:leirh3ovubd4vmgkjbdd3f6yf4
Orthogonal Polynomial-Based Nonlinearity Modeling and Mitigation for LED Communications
2016
IEEE Photonics Journal
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A memory polynomial is often used for LED nonlinearity modeling and mitigation in the literature. ...
A memory polynomial is often used for LED nonlinearity modeling and mitigation in the literature. ...
Although orthogonal polynomial based techniques have been investigated for power amplifier modeling and predistorter design, it is the first time to apply orthogonal polynomial based technique to LED nonlinearity ...
doi:10.1109/jphot.2016.2581485
fatcat:usk22vyjwbcqxglymq3r3yevlu
A Simplified Accuracy Enhancement to the Saleh AM/AM Modeling and Linearization of Solid-State RF Power Amplifiers
2020
Electronics
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A transpose architecture of finite-impulse digital filter is used to quantify the memory effect in SSPAs. A least-squares method is used for extracting all the model parameters. ...
A linearization technique using a three-parameter digital predistortion model is also calculated to compensate for the AM/AM nonlinear distortion in SSPAs. ...
Acknowledgments: The authors would like to acknowledge James Morris from the Department of electrical and computer engineering at Portland State University for contributions on proofreading this article ...
doi:10.3390/electronics9111806
fatcat:55dhf6kucrbzxpdc7jpao3njg4
Power amplifier linearization technique with IQ imbalance and crosstalk compensation for broadband MIMO-OFDM transmitters
2011
EURASIP Journal on Advances in Signal Processing
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This study proposes a MIMO-PD system that linearizes the power amplifier response and compensates nonlinear crosstalk and IQ imbalance effects for each branch of the multiantenna system. ...
The design of predistortion techniques for broadband multiple input multiple output-OFDM (MIMO-OFDM) systems raises several implementation challenges. ...
multiple output; MLP: memoryless polynomials; MP: memory polynomial; PA: power amplifier; PD: predistortion. ...
doi:10.1186/1687-6180-2011-19
fatcat:uqwqsqi7n5fvpp4ukic3pgi3sy
An Efficient Predistorter Design for Compensating Nonlinear Memory High Power Amplifiers
2011
IEEE transactions on broadcasting
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Moreover, the designed predistorter is capable of successfully compensating serious nonlinear distortions and memory effects caused by the memory HPA operating in the output saturation region. ...
Simulation results obtained are presented to demonstrate the effectiveness of this novel digital predistorter design. ...
INTRODUCTION H IGH POWER AMPLIFIER (HPA) is an indispensable component for any wireless communication system. ...
doi:10.1109/tbc.2011.2165008
fatcat:4rg7w33mbfcknhujq6h6ajdm6u
Predistorter Design Employing Parallel Piecewise Linear Structure And Inverse Coordinate Mapping For Broadband Communications
2006
Zenodo
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Publication in the conference proceedings of EUSIPCO, Florence, Italy, 2006 ...
CONCLUSIONS A low-complexity predistorter (PD) designed using the simplicial canonical piecewise linear (SCPWL) function that compensates for nonlinear power amplifiers (PA) with memory is proposed. ...
INTRODUCTION In communications systems, the power amplifier (PA) in the transmitter is an important component. ...
doi:10.5281/zenodo.53348
fatcat:qjnjedf7fzcibdxudagzlecana
A Combinatorial Impairment-Compensation Digital Predistorter for a Sub-GHz IEEE 802.11af-WLAN CMOS Transmitter Covering a 10x-Wide RF Bandwidth
2015
IEEE Transactions on Circuits and Systems Part 1: Regular Papers
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(CIM) of mixers, and nonlinearities of power amplifier (PA) with memory effect. ...
A novel one-shot calibration for reuse in the entire TV-band is demonstrated also, showing EVM 4.2% and ACLR 39.8 dBc. ...
Yet the employed look-up table [11] and memory polynomial [12] are only suitable for memoryless or low memory effect systems. ...
doi:10.1109/tcsi.2015.2390561
fatcat:eclci6dzu5horelyqda4gvzfly
Power Backoff Reduction Techniques for Generalized Multicarrier Waveforms
2008
EURASIP Journal on Wireless Communications and Networking
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Amplification of generalized multicarrier (GMC) signals by high-power amplifiers (HPAs) before transmission can result in undesirable out-of-band spectral components, necessitating power backoff, and low ...
We evaluate variations of several peak-to-average power ratio (PAPR) reduction and HPA linearization techniques which were previously proposed for OFDM signals. ...
ACKNOWLEDGMENTS This work has been performed in the framework of the IST Project, IST-4-027756 WINNER, which is funded by the European Union. ...
doi:10.1155/2008/437801
fatcat:n63wdtvsnzhxpdserq3a5rpnte
Recursive learning-based joint digital predistorter for power amplifier and I/Q modulator impairments
2010
International journal of microwave and wireless technologies
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The main implementation impairments degrading the performance of direct-conversion radio transmitters are in-phase/ quadrature (I/Q) mismatch, local oscillator (LO) leakage, and power amplifier (PA) nonlinear ...
In this article, we propose a recursive least-squares-based learning algorithm for joint digital predistortion (PD) of frequency-dependent PA and I/Q modulator impairments. ...
The PA predistorter is a parallel Hammerstein (PH) or memory polynomial predistorter with the static nonlinearities given by the polynomials c p (x n ) = k[IP;p u k,p |x n | k−1 x n , p [ I P , (1) with ...
doi:10.1017/s1759078710000280
fatcat:dite5sekz5a2zmjdojmq27xbpa
Preparing Linearity and Efficiency for 5G: Digital Predistortion for Dual-Band Doherty Power Amplifiers with Mixed-Mode Carrier Aggregation
2017
IEEE Microwave Magazine
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Finally, thanks to Rohde and Schwarz for their sponsorship of the platform measurement equipment and to the IEEE MTT-11 and MTT-9 Technical Committees for their support of the DPD design competition. ...
Telmo Reis Cunha from the Universidade de Aveiro in Portugal for their work in organizing the competition, including hosting and maintaining the excellent Weblab platform. We also thank Prof. ...
The test signal, shown in Figure 1 , is a single 500 µs frame composed of two carriers: a 4-carrier Global System for Mobile Communications (GSM)-like signal and a single-carrier orthogonal frequency-division ...
doi:10.1109/mmm.2016.2616185
fatcat:welmodhrvjexpi7osfmz2rm4pu
A very low-complexity filter lookup-tabledesign with non-uniform spacing for SOAlinearization
2020
IET Optoelectronics
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Non-linearities introduced by power amplifiers in communication systems have been a subject of interest for industry and academia for a long time. ...
The work is mainly aimed at coherent optical-orthogonal frequency-division multiplexing systems including low-cost semiconductor optical amplifiers. ...
System model and FLUT predistortion Throughout this study, we consider a coherent OFDM transmitter with the PA acting as a power booster. ...
doi:10.1049/iet-opt.2019.0044
fatcat:4lamwyp4t5bxjdwtripujzctbu
Digital Predistorter Design Using B-Spline Neural Network and Inverse of De Boor Algorithm
2013
IEEE Transactions on Circuits and Systems Part 1: Regular Papers
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CONCLUSIONS An novel digital predistorter design has been proposed to compensate distortions caused by memory high power amplifiers based on the direct learning framework using a datadriven B-spline Wiener ...
INTRODUCTION High power amplifier (HPA) as an indispensable component can be found in any wireless communication system. ...
doi:10.1109/tcsi.2012.2226514
fatcat:52xj44xyorap7b53bo4ujcy6mm
A Crest Factor Reduction Technique for LTE Signals with Target Relaxation in Power Amplifier Linearization
2022
Sensors
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Therefore, peak and average power levels have to be limited to correct high PAPR for a better suited correction power from the amplifier that can lead to compression or clipping in the signal of interest ...
The signal conditioning treatment to achieve good relation of power with radio-frequency (RF) conversion in conventional transceiver systems require precise baseband models. ...
Additionally to UABC and TECNM/Tijuana Institute of Technology, for the support provided for the development of this research. ...
doi:10.3390/s22031176
pmid:35161921
pmcid:PMC8840697
fatcat:hjdhhnjzavhhpoy2srkxzwczkm
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